FOD817B3SD

The FOD817B3SD is an optoisolator, also known as an optocoupler, which is used to transfer electrical signals between two isolated circuits using light. It provides electrical isolation and protection in electronic applications by using an infrared LED on the input side and a phototransistor on the output side. This device is often used to prevent high voltages from affecting the system receiving the signal, making it ideal for applications that require signal isolation such as power supplies, microcontrollers, and other digital circuits.
The FOD817B3SD typically features a high input-output isolation voltage, low power consumption, and high data transmission rates. It is designed to work within a wide range of temperatures and is available in various package types for easy integration into different circuit designs. The optoisolator enhances safety and reliability by mitigating noise interference and electrical surges, making it an essential component in modern electronic systems that demand robust performance and isolation capabilities.

The FOD817B3SD is a phototransistor optocoupler. Equivalent products from other manufacturers include the LTV-817 series from Lite-On, PC817 series from Sharp, and EL817 series from Everlight. These optocouplers typically offer similar functionality, featuring a phototransistor output with an infrared LED input, and are used for electrical isolation between high- and low-voltage circuits. Always verify the specific electrical and mechanical characteristics to ensure compatibility for your application.

The FOD817B3SD is an optoisolator component designed for electrical isolation in various applications. Key features include:
1. Phototransistor Output: Utilizes a phototransistor for signal transmission, ensuring reliable performance.

2. High Isolation Voltage: Provides up to 5,000 Vrms isolation, making it suitable for high-voltage applications and protecting sensitive components.
3. Compact Package: Available in a compact, standard 4-pin DIP package, which aids in saving space on circuit boards.
4. Input-Output Isolation: Offers significant input-output isolation, minimizing interference and enhancing safety.
5. Wide Operating Temperature Range: Functions effectively across a broad temperature range, typically -55°C to +110°C.
6. Compliance: Meets safety standards such as UL, CSA, and VDE for reliable performance in industrial and consumer electronics.
7. High Collector-Emitter Voltage: Supports up to 80V, allowing for versatile usage in various circuits.
These features make the FOD817B3SD ideal for applications in power supplies, telecom equipment, and microprocessor-based systems where isolation is critical.

The FOD817B3SD is an optocoupler with a 4-pin configuration. It functions to isolate different sections of a circuit, allowing signals to pass between them without direct electrical connection, thus providing protection against high voltages and noise.
The pin configuration for the FOD817B3SD is as follows:
1. Pin 1 (Anode): Connects to the input side, where the input current flows into the LED.
2. Pin 2 (Cathode): Connects to the input side, where the input current flows out of the LED.
3. Pin 3 (Emitter): Connects to the output side, serving as the ground or reference point for the output phototransistor.
4. Pin 4 (Collector): Connects to the output side and is used to output the signal from the phototransistor, which is activated by the LED.
This optocoupler is commonly used in applications requiring electrical isolation, including power supply feedback control, signal isolation, or interfacing different voltage levels.

The FOD817B3SD is manufactured by ON Semiconductor, which is now known as onsemi. onsemi is a leading supplier of semiconductor-based solutions, focusing on intelligent power and sensing technologies. The company designs, manufactures, and markets a broad portfolio of products, including power management, analog, sensors, logic, timing, connectivity, discrete, SoC, and custom devices. These components are used in various applications such as automotive, industrial, consumer, communications, and computing sectors. onsemi is known for its emphasis on energy-efficient innovations and plays a significant role in enabling smarter, safer, and more sustainable electronic systems.

The FOD817B3SD is a phototransistor optocoupler commonly used in various applications due to its ability to provide electrical isolation and signal transfer between different parts of a system. Key application areas include:
1. Switching Power Supplies: Isolating control signals from high-voltage circuits.
2. Microprocessor System Interfaces: Ensuring safe data communication between components.
3. Signal Isolation: Protecting sensitive components from high voltage in industrial, automotive, and consumer electronics.
4. Telecommunications: Isolating circuits to prevent noise and interference.
5. Medical Equipment: Providing isolation for patient-connected devices to ensure safety.
These applications leverage the optocoupler’s ability to transmit data while maintaining electrical separation.

The FOD817B3SD is typically available in a 4-pin dual in-line package (DIP), often used for optocouplers. This package type is designed for through-hole mounting on printed circuit boards (PCBs).